The word Prometaphage is composed of the Greek words pro meaning original, meta meaning middle and phage meaning stage. The stage between prophase and metaphase is called prometaphase.
In the prometaphase stage, the nuclear membrane and nucleolus completely disappear. Chromosomes become more compact, thicker and shorter. The spindle apparatus is formed from centrioles in animal cells and from microtubules in plant cells. Spindles are composed of proteins and are bipolar. The space between the spindle machines is called equator/equator/neutral/intermediate zone. Both poles are called polar regions. Spindle machines are of two types. Spindle fibers and attraction fibers. Spindle apparatuses that extend from one pole to another are called spindle fibers. The spindle apparatuses to which chromosomes are attached are called attraction fibers or chromosomal fibers or traction fibers. Attraction fibers attach to the pea protein at the kinetochore of the centromere. Chromosomes exhibit chromosomal dance by joining filaments. Aster filaments arise from centrioles at the two poles of the spindle apparatus in animal cells.